SYSTEMS AND METHODS FOR DETECTING EFFORT EVENTS
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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Jun 30, 2009
filing date -
Jun 30, 2009
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Abandoned
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Abstract
A method and system for detecting effort events is disclosed. Effort may be determined through feature analysis of the signal as transformed by a continuous wavelet transform, which may be compared against a reference effort measure to trigger an effort event flag that signals the onset and/or severity of an effort event. For example, a respiratory effort measure may be determined based at least in part on a wavelet transform of a photoplethysmograph (PP G) signal and features of the transformed signal. A respiratory reference effort measure may be based at least in part on past values of the respiratory effort measure, and a threshold test may be used to trigger an effort event flag, which may indicate a marked change in respiratory effort exerted by a patient.
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